问题
Each time I click the "Run as" button, I get the following message.
"The selection cannot be launched, and there are no recent launches."
If I select the pull down arrow near the "Run as" button, and select the New configuration option (this is the configuration I setup to launch using localhost)... it works. But why doesn't the "Run as" button default to this?
Or better yet, how do I make sure the "Run as" button will default to this?
** UPDATE **
I solved the problem.. see my answer below.
回答1:
Go into the preferences under Run/Debug > Launching
There's a section called "Launch Operation" and I needed to select:
Launch the selected resource or active editor. If no launchable: Launch the previously launched application.
回答2:
I have a solution for that:
If you have imported project from local file system then go to the respective folder -> right click on that -> Promote to project -> Select a project type (Mine was Ruby-Primary) -> Finish.
Should work. Cheers!
回答3:
If you are new to Aptana and started a new file, say a .py file, MAKE SURE you also start a Project. You probably haven't started a project yet, so Aptana has no clue what to do with the file you are running. If you create a project and make it a Python project, NOW Aptana knows what to do with your new file and will run it correctly.
来源：https://stackoverflow.com/questions/8674453/aptana-the-selection-cannot-be-launched-and-there-are-no-recent-launches